Collapsible hoisting frame



Patented Dec. 14, 1937 UNITED STATES PATENTO'FFICE Henry A.

mast, Broo'iflyii, N. Y, assignor to David nettw, New York, 'N. Y.Application February is, 1937;, Serial No. 126,342 '4 claims.(crystal-'67) V This invention relates to iinprovementsin hoistingframes, being particularly'directed to a collapsible unit formed ofinternesting elements in association with a handle serving, uponassembly of the. elements, to lock the same in rigid and firm operativeposition.

Broadly, it is an object of this invention to provide a hoisting frameincorporating a plurality of internesting elements capable of angulardisplacement with respect to one another to form a grill or cage, andadapted to be locked in assembled position by the medium for supportingthe same.

Specifically, it is an object of this invention to provide a hoistingframe incorporating a plurality of support elements, each in the form ofa continuous loop and capable of internesting to form a knock-downassembly in substantially a single plane, the respective elements beingpivotally mounted with respect to one another, so that, upon angulardisplacement about a body or package, an enclosing cage therefor may beprovided, the handle for the frame being so formed and actuated as tolock the respective elements to provide a rigiddevice as assembled.

These and other advantages, capabilities and features of the inventionwill appear from the subjoined detailed description of one specificembodiment thereof illustrated in the accompanying drawing, in whichFigure 1 is a perspective view showing my hoisting frame as assembled.

Figure 2 is a front elevation showing my hoisting frame as collapsed.

Figure 3 is a perspective view of the locking handle.

Figure 4 is an end elevation in section taken along lines 4-4 of Figure2.

Referring to the reference characters in the drawing, my hoisting framecomprises a plurality of elements A and B, each provided in the form ofa substantially rectangular continuous loop and having respectivelyfaces Hi to l3 inclusive and I4 to- I? inclusive, the ends of the barsforming the elements being interlocked as r at Hi; the element A issmaller in length and height than element B, so that it may nest withinelement B, as shown in Figure 2, when the device is in knock-downcondition.

The respective elements A and B are interconnected by pivot membersrespectively at their heads and bases Ill-l2 and I l-l6, such pivotsbeing formed, for the purpose of illustration, of rivets l9, applied asshown in sectional view of Figure 4.

A' locking handle 23 for the device comprises in thisillustration, ofawire bentto form a triangle having legs 2| and 22 merging at apex 23,the portions of the wire 24 and 25 forming the base of the triangle,having their free ends extending to form arms 26 and 2'! disposed atright angle to the base and legs of the triangle,

, the extremities of the arms 26 and 21 having upstanding projections 28and 29. V V shbwn in Figures 1 and 2, the handle 20 is assembled toencompass the respective heads and bases |0|4 and |2-||5 across theirwidth; the handle being disposed so as to have the triangular legsthereof 2| and 22 adjacent the apex 23 rest against the surface of thehead of element B when the device is in collapsed form, while the arms26 and 21 of the base are suspended below the undersurface of the headof element A.

When the device is assembled through the angu-V lar displacement ofelement A with respect to element B about the upper and lower pivotmembers 9, the handle may be drawn upwardly in the direction of thearrow in Figure 1, so that legs 2| and 22 rest within the apices 30 and3| formed by the diametrically opposite heads of the elements, while theprojections 28 and 29 rest within the apices 32 and 33 formed by thediametrically opposite heads, the legs and projections above referred tobeing alternately disposed with respect to one another; thus forming afour-point locking medium to rigidly maintain the assembled frame andprevent the respective elements A and B thereof from being displaced.

In order to load the hoisting frame, the same istaken in the collapsedform (see Figure 2) and 7 material in the form of apackage or in a tub34 is disposed on base I2 of element A; the element B is then displacedabout pivots l9 at the heads and bases of the respective elements sothat, upon angular displacement, in this instance, right angulardisplacement of the respective elements, a barred or grilled cage forthe package is provided; the handle 20 is then drawn upwardly (seeFigure 1) by application of hook 35 acting on apex 23 thereof, so thatthe respective legs 2| and 22 and projections 28 and 29 enter into theapices between the respectiveportions of, the heads of the elements tolock the device.

To remove the package the hook 35 is with drawn from the apex of thehandle, permitting the handle to drop by gravity, thus releasing thepressure of the legs 2| and 22 and projections 28 and 29 against theportions of the heads of the respective elements at their apexformations;

placed about element A to cause collapsing and internesting of suchelements.

It is obvious that various changes and modifications may be made to thedetails of construction without departing from the general spirit of theinvention as set forth in the appended claims. 1

I claim:

1. In a hoisting frame, a plurality of support members capable ofnesting one within the other, means for mounting said members to permitangular displacement thereof to form an enclosing cage, and meansadapted to be positioned at the respective apices defined by the supportmembers when disposed in angular relationship, for rigidly locking thesupports and maintaining said enclosing cage formation.

2. In a hoisting frame, a plurality of support members capable ofnesting one within the other, means for mounting said members to permitangular displacement thereof .to form an enclosing cage, and meansadapted to be positioned at the respective apices defined by the supportmem bers when disposed in angular relationship, for rigidly locking thesupports and maintaining said enclosing cage formation, said last namedmeans comprising a handle having formations at a plue rality of pointsnormally out of contact with the 4 support members when the same are innested form and adapted, upon being vertically displaced and maintainedunder tension, to rest in the aforesaid apices.

3. In a hoisting frame, a plurality of polygonal support members capableof nesting one within the other, means for pivotally mounting saidmembers to permit angular displacement one with respect to the other toform an enclosing grill or cage, and means adapted to be disposed at theapices defined by a plurality of adjacent faces of the respectivesupport members when disposed in angular relationship for rigidlymaintaining said support in angular position.

4. In a hoisting frame, a plurality of polygonal support members capableof nesting one within the other, means forpivotally mounting saidmembers to permit angular displacement one with respect to the other toform an enclosing grill or cage, and means adapted to be disposed at theapices defined by a plurality of adjacent faces of the respectivesupport members when disposed in angular relationship for rigidlymaintaining said supports in angular position, said last named meanscomprising a handle having formations at a plurality of points normallyout of contact with the support members when the same are in nested formand adapted, upon being vertically displaced and maintained undertension, to rest in the aforesaid apices.

HENRY A. PASTERNACK.

